Problem installing unix-2.3.2.0

[Simon Marlow]

On 04/04/2010 15:46, Antoine Latter wrote:
> Hi Libraries,
>
> cabal-install  tries to pull in unix-2.3.2.0 in it's install plan when
> installing cabal-install, but it doesn't successfully install for me
> under Ubuntu 9.10.
>
> Here's some cut'n'paste of what I've tried:
>
> $ cabal unpack unix-2.3.2.0
> Downloading unix-2.3.2.0...
> Unpacking to unix-2.3.2.0/
>
> $ cd unix-2.3.2.0/
>
> $ cabal install
> <snip>
> Building unix-2.3.2.0...
>
> dist/build/System/Posix/Signals.hs:127:0:
>       error: Signals.h: No such file or directory
> cabal: Error: some packages failed to install:
> unix-2.3.2.0 failed during the building phase. The exception was:
> ExitFailure 1
>
> $ find . | grep Signals
> ./System/Posix/Signals.hsc
> ./System/Posix/Signals
> ./System/Posix/Signals/Exts.hsc
>
> unix-2.3.0.1 seems to have the same problem, and cabal-install can't
> form a valid install plan for unix-2.3.0.0. I have hsc2hs in my path
> at version 0.67, and I'm using GHC 6.12.1. Is there some step I'm
> missing?

unix-2.3.x won't build using GHC 6.12.1, because we moved some header 
files.  Use unix-2.4.x instead (which also works with older GHCs).

Cheers,
	Simon